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    <title>受控组件 - 高阶函数</title>
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    <script>
        // 如果一个函数, 接受『函数类型』的参数, 或者返回『函数类型』的值,  那么这个函数被称之为『高阶函数』
        // Promise          new Promise((resolve, reject) => {})
        // setTimeout       setInterval(() => {}, 1000)
        // map, forEach, reduce, sort    [].map(item => {})
        // bind             fn.bind(null);



    </script>
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